Brake



W. T. HARRIS.

BRAKE.

APPLICATION FILED MAY 21,1920. 1,385,544. Patented July 26, 1921.

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@lttomwo W. T. HARRIS.

BRAKE.

APPLICATION FILED MAY 21, 1920.

' wmm UNITED STATES PATENT QFFIQE.

WILLIAM T. HARRIS, 0F HARRODSB'URG, KENTUCKY.

BRAKE.

Patented July 26', 1921.

Application filed May 21, 1920. Serial No. 383,092.

To all to 720m it may concern Be it known that I, WVILLIAM T. HARRIS, a citizen of the United States, residing at Harrodsburg, in the county of Mercer and State of Kentucky, have invented a new and useful Brake, of which the following is a specification.

This invention relates to brakes, and more particularly to brakes of the chock type, to be employed in connection with excavating machines, wherein a portable track is employed for supporting the machine.

The primary object of the invention is to provide a chock adapted to be moved into engagement with the track on which the machine is supportechthe chock having automatic gripping means to grip the tread or head of the rails forming the track, to insure against the chock slipping under the weight of the machine. I

A further object of the invention is to provide gripping means which will be operated by the weight of the machine contacting with the chock, to cause the gripping elements to securely grip the rails.

WVith the foregoing and other objects in view Which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings Figure 1 illustrates a plan View of the chock, showing the same as applied to railway rails.

Fig. 2 is a side elevational- View of the same. I

Fig. 3 is a fragmental detail view of the wheel engaging portion of the body of the chock, and

Fig. 4 is a fragmental detail view of the means for operating the clamping elements.

Referring to the drawings in detail, the chock body includes a relatively large beam indicated at 5, formed of any suitable material, the beam in the present showing being formed of wood, one surface thereof being cut away to accommodate the wear plates 6, which are disposed adjacent to op posite ends of the beam, and; secured thereto by means of the bolts 7.

Secured to the opposite surface of the beam 5, are the spaced securing bars 8 and 9, each of which being provided with cut out portions 10 to accommodate the heads 11, formed at one end of the respective supporting bars 12, the securing bars 8 and 9 being maintained in proper relation with each other by means of the bolts 13 passing therethrough.

The bolts 14 and 15 connect the securing bars 8 and 9 to the beam 5, in a manner to prevent displacement thereof under normal conditions. From the foregoing it is obvious that the bars 12 are free to pivot with relation to the beam 5, to permit the clamping elements, to be hereinafter more fully described to adjust themselves to various positions to cause the proper clamping of the rails.

The forward end of each of the bars 12, is bifurcated as at 16 to accommodate the arms 17, which have one of their respective ends positioned between the furcations of and plvota-lly connected the bifurcated ends, thereto by means of the pivot pin 18, so that the arms will pivot with relation to the bars 12.

Formed at the forward end of each of the arms 17, are the teeth 19, which grip the side faces of the tread of the rail, to prevent movement of the beam 5, or body of the chock, longitudinally of the rails on which the same is positioned; These bars 17 are arranged in pairs to clamp opposite sides of the rail, and as shown the arms of each pair are connected by a transversely extending arm 20 pivotally connected to the arms by means of the pivot pins 21, which pass through suitable openings in the arms 17 and 20.

Positioned intermediate the ends of each of the arms 20, is an eye bolt indicated at 22, adapted to accommodate a portion of the flexible controlling member 23, which has connection with the chain 24, and by means bars 12 to move laterally chains 25 are also connection therewith in any suitable location on the frame.

In order that the arms 17 will be held to the rails, clamping members 24 are provided, which clamping members are secured to the arms 17 adjacent to the free ends thereof, and are constructed to engage under the bases of the rails, when the arms are moved into engagement therewith.

The chock is also secured to the machine associated therewith (not shown), by means of the chains 25 which have connection with the chockadjacent to the outer ends thereof, and it will thus be seen that when the machine is moved, the chock is correspondingly moved to change its location to properly chock the machine.

7 In the operation of the device, the body portion or beam 5 is positioned on the rails of a track on which an excavating machine, which has connection therewith, is operated, the flexible members 23 being slackened to permit the body portion to rest on the rails of the track. The body portion is then forced into engagement with the wheels of the machine so that movement of the wheels in one direction will cause the arms 17 and away from the rail associated therewith, to the end that the teeth '19 of the bars 17 grip the rail in a manner to prevent movement of the machine with relation to the track supporting the machine.

What is claimed as new is i- 1. 'In combination with the rails of a railway track, a chock including a body portion,

pivoted clamping arms carried by the body portion, means for raising the arms out of engagement with the rails, andv said clamping arms adapted to clamp the rails upon movement of the body portion in direction.

2. In combination with the rails of a railway track, a chock including a body portion, clamping arms having pivotal connection with the body portion, means for supporting the clamping arms to cause the same to move into clamping engagement with the ralls, when the beam is moved in one direction, and means to permit the clamping arms to be moved into and out of engagement with the rails.

3. In combination with the rails of a railway track, a chock including a body portion supported on the rails, supporting bars having connection with the body portion, clamping arms pivot-ally supported by the supporting bars, means for pivotally connecting the arms intermediate their ends, teeth formed adjacent to the end of the ends of the clamping arms to cause the arms to bite into the rails, and means for moving the clamping arms out of engagement with the rails.

4. In combination with the rails of a railway track, a check including a body portion supported on the rails, securing bars secured to one of the surfaces of thebody portion, said securing bars being arranged in pairs and provided with cut out portions, supporting bars having heads disposed within the cut out portions to permit of movement of the supporting bars with relation to the body portion, clamping arms pivotally connected to the supporting bars, said clamping arms adapted to move into clamping engagement with the rails, when the body portion is moved in one direction, and means for moving the clamping arms into and out of engagement with the rails.

5. In combination with the rails of a rail- 7 WILLIAM r. nan-Bis.

\Vitnesses Gno. Pon'rnn, CLYDE NUNEY. 

